6445310646 has 8 divisors (see below), whose sum is σ = 12890621304. Its totient is φ = 2148436880.

The previous prime is 6445310621. The next prime is 6445310681. The reversal of 6445310646 is 6460135446.

It is a sphenic number, since it is the product of 3 distinct primes.

6445310646 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537109215 + ... + 537109226.

It is an arithmetic number, because the mean of its divisors is an integer number (1611327663).

Almost surely, 2^6445310646 is an apocalyptic number.

6445310646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6445310646 is a wasteful number, since it uses less digits than its factorization.

6445310646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074218446.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 6445310646 is about 80282.6920699599. The cubic root of 6445310646 is about 1861.0067627522.

The spelling of 6445310646 in words is "six billion, four hundred forty-five million, three hundred ten thousand, six hundred forty-six".